Dumanić families are Croats and they are mostly from Split. In the past century, relatively most of Croatian residents bearing this family name were born in Split and Zagreb.
Prevalence
About 220 people with faimily name Dumanić live in Croatia today, in 100 households. There were 200 of them in the middle of the past century, and their number increased by 10 percent. They are located in 6 Croatian counties, in 10 cities and 7 other places, mostly in Split (220), Zagreb (<10), Velika Gorica (<5), Pula (<5), and in Solin (<5).
Outside Croatia
Family name Dumanić is present in 7 countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 2007 in source Encyclopaedia of Croatian Surnames.